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(No Model.) 2 SheetsS!ieet 1. J. & E. R. CORBETT. PLUNGER FOR'GRBASING 0R OREASING AND FOLDING M AGHINES.

No. 497,949. Patented May 23; 1893.

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2 Sheets-Sheet 2. J. &V E. R. GORBETT. PLUNGER PORORBASING 0R GRBASING AND FOLDING MACHINES.

Patented May 23, 1893.

R N WITNESSES: q m '4 IIVVENTOR! MBA/1 4 k I 7 I M w w r M g M Ma B 0/ r ATTORNEYS.

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UNITED STATES PATENT OFFICE.

JOSEPH CORBETT AND EDWIN R. CORBETT, OF NEW YORK, N. Y., ASSIGNORS TO THOMAS F. SHAW, OF SAME PLACE.

PLUNGER FOR CREASING R CREASING AND FOLDING MACHINES.

SPECIFICATION fomngpart of Letters Patent No. 497,949, dated May 23, .1893.

Application filed March 1, 1892. Serial No. 423,374- (No model.)

To aZZ whom it may concern.-

Be it known that we, JOSEPH CoRBETr and EDWIN R. CORBE TT, citizens of the United States, residing in the city of New York, in the county and State of New York, have invented certain new and useful Improvements in Plungers for Greasing or Creasing and Folding Machines, of which the followingis a specification.

[o This invention relates to certain improvements in the so-called plungers and boxes for creasing or creasing and folding-machines by which the blank from which an envelope or other article is made is creased preparatory I 5 to folding, said plungers and boxes being adapted to be readily adjusted for any desired size of blank, so that any required size of envelope or other article can be quickly and conveniently manufactured, so as to meet the different requirements of the trade.

The invention consists of a creasing-device in which the plunger and box are made adjustable in longitudinal as well as in lateral direction, the plunger being composed of an interior frame, the side-plates of which are pivoted to the lower ends of swinging arms, the upper ends of which are pivoted to the plunger-rod, said arms being guided on fixed arms attached to the plunger-rod below the pivot-connection of the swinging-arms with the same, the latter being secured by means of set-screws on said guide-arms. The sideplates of the inner frame of the plunger are adjusted on the lower ends of the pivot-rods 3 5 by a suitable adj usting-device so as to be set parallel to the side-bars of the creasing-box. Each side-plate of theinner frame is provided with a fixed plate and two adjustable plates that are guided by means of slots and setscrews on the fixed plate, the lower edges of the plates being beveled, so as to produce one continuous edge for the creasing-operation. The box is constructed of stationary parallel rails having guide-slots,longitudinal bars that 5 are guided in the slots of said rails and transverse bars which are guided in keepers on the adjustable bars and provided with fasteningdevices for adjusting the transverse bars on the longitudinal bars, according to the size of blank to be creased.

In the accompanying drawings, Figure 1 represents a plan, partly in horizontal section through the plunger-rod of our improved plunger and box for creasing or creasing and folding-machines. Fig. 2 is a vertical longitudinal section on line 2 2, Fig. 1; and Fig. 3 is a sideelevation of the plunger.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents the plunger and B the box of our improved creasing-device. The plunger A is supported by four arms a, which are pivoted to cars a of the plunger-rod A and which are guided by means of slots a in theirmiddle-portions, or by other 6 5 means on fixed arc-shaped arms A that are rigidly attached to a downwardly-extending portion A of the plunger-rod A. The pivot-arms a may be adjusted to any suitable angle of inclination on the guide-arms A and secured 7o thereto by means of set-screws a. The lower ends of the pivot-arms a are connected with the side-plates b of the interior-frame of the plunger by pivots b which turn in bearings of lugs or ears b of the side-plates b and provided with pinions b rigid on the lugs 12 and which mesh with worm-screws if supported in laterally-projecting lugs 12 at the lower ends of the pivot-arms a, said worm-screws meshing with the pinions and permitting the quick and convenient adjustment of the sideplates 1) to a position parallel with the sidebars of the creasing-box, whenever the angle of inclination of a the pivot-arms a to the "crtical axis of the plunger has been changed. To each side-plate b of the plunger A is attached by screws d a fixed plate cl, which in connection with two extensible, longitudinally-recessed plates (1' form the exterior frame of the plunger. The lower edge of the fixed plate d is provided with an outwardly-beveled lip (1 to which are fitted the correspondingly-beveled lower edges of the adjustable plates 61', so that a sharp creasing-edge is formed along the lower part of the plunger, 5 to whatever position the exterior side-plates of the plunger are adjusted on the fixed plates 01. The transverse adjustable plates 01 of the plunger extend over the longitudinal sideplates of the same, as shown clearly in Fig. roo

1, so that a creasing-edge is formed along the lower part of the plunger, which can be adjust'ed to the exact size of envelope to be produced. In place of the worm-screw and pinion by which the inner side-plates b of the plunger are adjusted, so as to be supported in proper position toward the side-bars of the creasing-box at the lower ends of the pivotarms a, any other adjustable device may be used, or a simple clamping-device, by which the inner plates of the plunger-frame are firmly secured to the lower ends of the pivotrods, as we do not desire to confine ourselves to the special construction of the adj ustingdevice shown.

The box B is constructed of stationary parslots e in which the longitudinal bars B of the creasing-box are guided and to which they or othersuitable fastening-devices.

screws e as shown in Fig. 1.

tions, the longitudinal bars B may be provided with-sleeve-shaped keepers f that are made adjustable on said bars, and which are provided with transverse slots at the under side in which the transverse bars B are guided, said bars being adjusted in said keepers by means of set-screws f, while the keepers themselves are secured to the longitudinal bars by additional set-screws f as shown in Fig. 2. By the slotted portions of the longitudinal and transverse bars 13 and B and their set-screws or keepers, the transverse bars B can be readily adjusted on the longitudinal bars B while the latter are adjusted on the stationary rails B, after which they are firmly secured in position. The creasing-box B can thus be adjusted exactly to the size of the plunger, due allowance being made for the thickness of the material of which the blank of the envelope or other article is composed, so that the flaps which are bent-up from the body of the blank by the edges of the plunger and box find sufficient space between the same. By adjusting the longitudinal and transverse bars of the box B, the latter can be readily adjusted to the different sizes to which the plunger is adjusted, so that any size of blank for enve1- opes or other articles Within certain limits can be creased by the plunger or box, as soon as the required adjustment as to the length and width of the article to be produced is set off in the plunger and box. WVhen it is desired to crease only the opposite sides of an article, the plunger would then require only two pivot-arms instead of four, to which the required side-plates and laterally-extensible plates are applied.

The advantages of our improved plunger and box for creasing or creasing and foldingmachines are, that the same can be readily adjusted for any desired size of blank to be creased, the smallest size to be produced corresponding to the space inclose-d by the abutting-ends of the fixed guide-plates d, while the largest size of envelope is defined by the greatest extent to which the pivot arms of the plunger can be adjusted, provision being made that the plunger-rod can be lowered sufficientlyso that the proper distance of the edges of the plunger from the edges of the creasing-box be retained.

We do not claim in this application anything which is described and claimed in the application for a plunger and box for creas ing or creasing and folding-machines, which was filed June 27, 1891, Serial No. 397,684..

Having thus described our invention, what we claim as new, and desire to secure by Letg ters Patent, isare firmly secured by means of set-screws e, E The longitudinal bars B are also provided with slots j. e on which the slotted portions of the trans j verse bars B are adjusted by means of set- I In place of providing the transverse bars B with slot-ted porf 1. The combination, in a creasing or creasing and folding-machine, of an adjustable box formed of stationary rails and longitudinal and transverse bars connected at right angles with each other,-with a plunger comprising pivot-arms, connected to the plunger rod, means for guiding said arms, means for holding said pivot arms in their adjusted position, interior side-plates pivoted to the lower ends of said pivot-arms, means for adjusting said side-plates on the pivot-arms, and exterior extensible plates applied to said side-plates,

substantially as set forth.

2. The combination,in a creasing or creasing and folding-machine, of a box, formed of stationary rails, longitudinal bars guided in slots of said stationary rails, and transverse bars guided in slots of the longitudinal bars,

with a plunger, comprising pivot-arms, connected to the plunger rod, means for guiding said rods, means for holding said pivot arms in their adjusted position, interiorside-plat-es pivoted to the lower ends of the pivot-arms, means for adjusting the interior side-plates on the pivot-arms, guide-plates attached to the interior plates, extensible plates guided on said guide-plates, and means for fastening the extensible plates on the guide-plates, substantially as set forth.

3. A plunger for creasing or creasing and folding machines, comprising pivot-arms attached to the plunger rod, means for holding said pivot-arms in their adjusted position, in terior side plates pivoted to the lower ends of the pivot-arms, means for securing the interior plates on the pivot-arms, exterior and extensible plates applied to the interior sideplates, substantially as set forth.

4. A plunger for creasing or creasing and folding-machines, composed of arms pivoted to the plunger-rod, means for guiding said pivot-arms, means for holding the pivot arms in their adjusted position, interior side-plates pivoted to the lower ends of the pivot-arms, means for adjusting said interior plates on the pivot-arms, guide plates attached to the interior side-plates, exterior extensible plates IIO slotted extensible plates guided on the guideplates and means for attaching the extensible 15 plates to the guide-plates, substantially as set forth.

In testimony that we claim the foregoing as our invention we have signed our names in presence of two subscribing witnesses.

JOSEPH CORBETT. EDWIN R. CORBETT.

Witnesses:

PAUL GOEPEL, MARION HALL. 

